ABB ACS350 User Manual

Also see for ACS350 Series: User manual User manual Installation instructions Installation instructions Installation instructions

ABB ACS350 User Manual Manual pdf 29 page image

Electrical installation29Procedure1. On IT (ungrounded) systems and corner grounded TN systems, disconnect theinternal EMC filter by removing the EMC screw. For 3-phase U-type drives (withtype code ACS350-03U-), the EMC screw is already removed at the factory andreplaced by a plastic one.WARNING! If a drive whose EMC filter is not disconnected is installed on an ITsystem [an ungrounded power system or a high resistance-grounded (over30 ohms) power system], the system will be connected to earth potential through theEMC filter capacitors of the drive. This may cause danger or damage the drive.If a drive whose EMC filter is not disconnected is installed on a corner grounded TNsystem, the drive will be damaged.2. Fasten the grounding conductor (PE) of the input power cable under thegrounding clamp. Connect the phase conductors to the U1, V1 and W1 terminals.Use a tightening torque of 0.8 N∑m (7 lbf in.) for frame size R1 and 1.7 N∑m(15 lbf in.) for R3.3. Strip the motor cable and twist the shield to form as short a pigtail as possible.Fasten the twisted shield under the grounding clamp. Connect the phaseconductors to the U2, V2 and W2 terminals. Use a tightening torque of 0.8 N∑m(7 lbf in.) for frame size R1 and 1.7 N∑m (15 lbf in.) for R3.4. Connect the optional brake resistor to the BRK+ and BRK- terminals with ashielded cable using the same procedure as for the motor cable in step 3.5. Secure the cables outside the drive mechanically.22334EMCDisconnecting EMC screw,frame size R1 and R31Connecting power cables andgrounding (R3)Connecting power cables andgrounding (R3)2 4 323